LimitationsWe acknowledge that our

Limitations
We acknowledge that our study had limitations. Firstly, the
size of the study was small. Secondly no information was
collected on the intensity of ongoing training activities in
the intervention group between weeks 8 and 20. Although
all patients in this group were offered free gymnasium
membership for 6 months, it would have been helpful to
know the take up and frequency of exercise intervention.
Finally exacerbations were treated by their primary care
physician and this data was not collected for this pilot
study.